[Bug]: TypeScript type generator references removed spec/ directory

[sakinaroufid]

The generate_ts_schema_types.js script references the spec/ directory (line 5), which was removed in #125. Per CONTRIBUTING.md, schemas now live in source/.

Current behavior:
Running node generate_ts_schema_types.js finds 0 schemas because spec/ doesn't exist.

Expected behavior:
The script should reference source/ to match the current project structure, or be removed if no longer maintained.

Context:

• PR fix(schema): publish UCP annotated schemas #125 removed spec/ and migrated to source/
• The Python model generation is documented in CONTRIBUTING.md (line 233-237), but TypeScript is not mentioned
• The existing generated/schema-types.ts is stale

Question: Is this generator still intended to be used? Happy to submit a fix PR or a cleanup PR depending on the answer! :)

Looking forward to an answer. Excited to contribute!